tert-butyl 9-oxa-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate   、                                                                                      
toluene-4-sulfonic acid 2-{1-[2-(4-cyanophenoxy)ethyl]-3-methylureido}ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                生成                                                 7-(2-{1-[2-(4-cyanophenoxy)ethyl]-3-methylureido}ethyl)-9-oxa-3,7-diazabicyclo[3.3.1]nonane-3-carboxylic acid tert-butyl ester